20244044021 has 8 divisors (see below), whose sum is σ = 21138995520. Its totient is φ = 19350323872.

The previous prime is 20244044017. The next prime is 20244044033. The reversal of 20244044021 is 12044044202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20244044021 - 2² = 20244044017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20244044081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274151 + ... + 340068.

It is an arithmetic number, because the mean of its divisors is an integer number (2642374440).

Almost surely, 2^20244044021 is an apocalyptic number.

It is an amenable number.

20244044021 is a deficient number, since it is larger than the sum of its proper divisors (894951499).

20244044021 is a wasteful number, since it uses less digits than its factorization.

20244044021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615675.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 20244044021 its reverse (12044044202), we get a palindrome (32288088223).

The spelling of 20244044021 in words is "twenty billion, two hundred forty-four million, forty-four thousand, twenty-one".